Why Finger Size Matters

Michael Pirrocco


“There has been a mountain of corollary evidence linking digit ratio to sexual differences,” says study co-author Martin Cohn. “It’s becoming increasingly clear that some adult traits and diseases can be traced to hormonal disruptions in the womb.” According to John T. Manning, who identified the link between finger length and prenatal hormones, the ratio best predicts athletic talent. Still, “Perfectly normal males with perfectly normal testosterone can have longer index fingers,” says Cohn.
